Friction transmission-gear.



T. C. DU-SO. K

FRICTION TRANSMISSION GEAR.

APPLICATION FILI-:D nEc.23, I9I4.

1,177,401. Patented M1.28,1916.

a SHEETS-SHEET I.

THB COLUMBIA PLANQCIRAPH co.. WASHINL'ITON. D. C.

T. c. 13u-s0.

FRICTION TRANSMISSION GEAR.

APPLICATION FILED DEC.23. l9l4. 1 177,401 Patented Mar. 28, 1916.

3 SHEETS-SHEET 2.

- 'mak 1?*0 N QQQN* ,Y I gnou/n10@ T C: 1311,50. WHY: como THB COLUMBIA PMNOGRAPH 0.. WASHINGTOrLm. C,

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AFIIICTION TRANSMISSION GEAR.

APPLICATION FILED DEc.23. 1914. v

51,177,401. Patented Mar. 28, 1916.

3 SHEETS-SHEET 3.

THEODORE C. IDU-S0, F IDAHO SPRINGS, COLORADO.

FRICTION TRANSMISSION-GEAR.

Specification of Letters Patent.

Patented Mal'. 28, 1916.

Application led December k23, 1914. Serial No. 878,752.

To all whom 'it may concern.'

Be it known that I, THEODORE C. DU-So,-a citizen -of the United States, residing at Idaho Springs, in the county of Clear Creek and State of Colorado, have invented certainnew and useful Improvements 1n Friction Transmission-Gears; and g I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.. Y, v This inventionrelates to friction transmission gears, designed more particularly for use in driving auto vehicles, butv capable of uses in many other relations, and one of the principal objects of the invention vis to providea variable friction gearing which shall Vbe simple inV construction, reliable in operation, which shall be light Vin weight and which may be manufactured at a comparatively low cost. Another object of the invention is to provide a friction transmission gear which will operate smoothly, which will be strong and durable and which will be provided with means for taking up wear, and which cannot readily get out of order.

These and other objects may be attained by means of the construction illustrated in the accompanying drawings, in which,

Y Figure 1 is a horizontal sectional view ofthe gear casing and showing thegear in plan, Fig. 2 is a horizontal sectional View taken through the shaft and operative parts of the gear, and Fig. 3 is a sectional view taken on line 3-3 of Fig. 1,.looking in the direction indicated by the arrow. a

Referring to the drawings, the numeral 1 designates the gear casing, and 2`are the bosses'or enlargements at the ends of the casing toy form bearings for the shaft. Within the casing 1 are partitions 3 and 4. The shafts `5 and 5a are mounted in ball bearings 6 at the ends of the casing and in similar ball bearings 7. at the partitions 3 and 4. The drive shaft 5 is'provided with alining slots 8, 9, 10,y and 11 andthe driven shaft 5@Lv is provided with similar slots 12 and 13.4 The shafts 5 and 5,? arev mounted in alinement with each other and ball bearings 14 are interposed between the adjacent ends thereof. TheA shafts 5 and 5?. are hollow and extending through the bore of said shafts are` rods 15 and 16, power being applied to the drive shaft 5 throughv the medium of the rod 15. lIhe rod 15 is provided with a slot 17, in line with the slot 8, and eX- tending through the rod 15 at the slot 17 and through the slot 8 in the shaft 5 is a pin 18 which engages a cam 19, said cam having a groove to accommodate the shiftingfork 2O and a cam 21 carrying4 an inclined or irregular periphery vto be engaged by a roller 22. The roller 22 is .mounted` upon an elbow lever 23 pivoted at124 to a collar 25 having projected spaced lugs'between4 Y whichthe lever'23 is pivoted. lIt'v will be seen upon reference to Figs. 1 and 3, that there Vare two elbowf levers 23, one upon each side of the shaft 5, and each of said levers carries a roller 26 which bear against avplate 27 formed'in two sectionsconnected together by bolts 28 with a pin 29- between them. The pin 29'extends through the rod 15 and through the slot y9 in the shaft 5.

' Alow speed beveled friction wheel 30, comprising two sections secured together by means of bolts 31, is mounted on the shaft and a pin 32 vextends through the rod 15 and throughvthe slot 10 in the shaft 5 and engages the friction wheel intermediate the two members or sections. An intermediate friction gear wheel 33, also formed oftwo sections forintermediate speedV is mounted upon the shaft'and provided with a pin 34 which extends through therod 16 and through the slot 11. Formed integral with the friction wheel 33 is a clutch member 35. The c'oacting clutch member 36 is mounted on the shaft 5a, and is keyed or otherwise fixed thereon.

A friction wheel`37 is fixed to the shaft 5a and is in constant rotation and contact with'the frictionwheel 37?L mounted on the counter-shaft 38. The counter-shaft 38 is mounted in ball bearings 39 formedin the j n partitions 3 and 1, and mounted on said counter-shaft are beveled friction wheels 30ato coact with the `wheel30 Vand the friction wheel "33a to coact vwith friction wheel 33. A

A circular ,plate 40 similar tothe plate 27 has Yconnected to it a pinffl which extends through the slot 12 inthe lshaft 5a and' through a hole in the rod. section 16.2 A cam 42,similar to the cam 21 is mounted on the shaft 5a, and is connected by means of the pin 43 through a slot- 44 to the ,rod 16. An elbow lever 45 pivoted at 46, one'upon each side of a collar 47 mounted on `the shaft 5a carries a roller 48 to bear against the plate 40 and a roller 49 to rollupon the cam 42. A shifting lever 50 provided witha fork 51 to engage the cam 42 is pivoted at 52 to a lug inside the casing and isprovided with a connecting bar 53`which` leads to a foot pedal in easy reach of the driver. The fork. r`is connected to a lever 54 pivoted at 55'and extending out through thev casing and connected to said lever is a rod 56 which leads to a hand lever.

Areversing device consistsof a friction Y wheel 57 on the counter-shaft. 38 and a friction wheel 57 L on'the shaft 5, andan intermediate frictionl wheel 58 which may be thrownY into and out .of contact with the wheels 57 and 57aV bymeans of a crank 59 mounted in bearings `60. A link'V 61 con nected to-a rod. 62, leads to the-drivers seat.y

For adjustingthe frictionwheels to take up wear, the ball bearing'members 63 are,V

connected by means of bolts 64 to the diverging -bars 65. The bolts 64 extend: through slots 66 in the partitions 3 and 4 and the kbars* are united in the center by a stud or projection 67 which extends through the mediate gears 33 andf?)a into contact, and for high speed the. clutch members 35 and` 36 are engaged. When it is desired to reverse the rotation the intermediate friction wheel is thrown into Contact with the wheels 57 and 57a,Y as will be understood.

Fromlthe foregoing it will be obvious that 1 a variable friction gear made in accordance with this invention fis veryv simple in construction, is reliable and efficient in use, can be. manufactured at low cost, is comparatively light in weight, is compact inform, and the wear can be read-ily taken up. The advantage of the .use of friction gear is obvious, thereis less; wear, there is a morey smoothrunningand lessjar in increasing speed, while back `lash and 4slipping teeth are entirely obviated.

Various changes maybe made inthe details of construction without departing from the spirit and sco-pe ofthe inventionas deinedin the claims',

. counter-shaft.

What is claimed is:-

1. A Avariable frictionl gearingcomprising. acasing, shafts mounted in the casing, rods 1 mounted within said shafts, cams mounted` on the shaftsnear the opposite ends thereof, pins extending from said cams through slots in the shafts and through slots in. the rod sections, elbow levers carrying; rollers, one-to` ride` on thelcam and onelt. contact with, a plate forshifting the rods, and beveled frictionfwheels.mounted on the shafts and connected to the rods, a counter-2 y shaft, `friction wheels mounted on thecoi1n-l 1 ter-shaft, and a permanentlyl rotating; fri-de' tion wheel on one ofthe shaftsand on they 2; In a variable friction gearing,V1 a casing, shafts mountedV in the `casingvon ball: bearings, rods extending; through said'1 shafts, Icams connected to said shafts; and rods by means of pins, means for shiftingl said cams, elbowdevers, each-carryingtwo: rollers, one to engage each of said camsand:I

the othery toi engage a'sectional-l plate, variy able friction gears on said shafts, and pinned p to sald rods, a counter-shafty carrying fric-` tion gears,and means for reversingvsaldf 3.A In ay variable friction gearing, shafts,

a counter-shaft, said shafts having rodsv 4eil-1 tending through the same, said shafts'zbeingff slotted, ypins extending throughk saidwslota'` and connected tosaid rods,vfrictionnwhe13z connected to2 said pins, mean'sfor. shifting; the variable friction wheels into ContactY with Acoacting wheels on f the Vcounterfshaftf and Emeans for taking up, :the wearfofthe-` friction wheel, said means comprisingnad: justable 4ball bear-ing membersv for moving;

the counter-shaft relativelyE to Vthe main f shafts.` y Y 4. In avariablefriction` gear, va casing, shafts mounted yin the casing, .rods extending through said shafts., pins extending through said rods, friction wheelsfengaged by said pins,a counter rshaft,i.friction:whee1s Ifo mounted onV the counter shaft, .and means mounted on said counter shaft, and :means for reversing the rotationl of `said shafts.

6. A variable friction gearing, comprlsin L; hollow shafts, rods extending` througltr-sat Shafts, aseries offzvarable ri-avionwheels',`

means for securin said friction Wheels on In testimony whereof I ax my signature sald shafts and ro s, means for shlftlng said m presence of two wltnesses. Wheels into and out of contact, means for reversing said shafts, a'counter shaft, frc- THEODORE C DU'SO' tion Wheels on said counter shaft, and means Witnesses:

for taking up the Wear of said friction B. A. HOLLEY,

wheels. C. I. SPEssARD.

copies ot this potent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

